HtmlElement txtUser = webBrowser1.Document.GetElementById("txtUser");
if (txtUser != null)
{
	txtUser.SetAttribute("value", "SLDAILYLLD01");
}

HtmlElement txtPassWord = webBrowser1.Document.GetElementById("txtPassWord");
if (txtPassWord != null)
{
	txtPassWord.SetAttribute("value", "212686764");
}

HtmlElement button = webBrowser1.Document.GetElementById("btLogin");
if (button != null)
{
	button.InvokeMember("click");
	MessageBox.Show("Test");
	button.SetAttribute("value", "DKM VNA");
}
else
{
	MessageBox.Show("Failt");
}